//go:build linux

package activator

import (
	"context"
	"errors"
	"os"
	"os/exec"
	"path/filepath"
	"testing"

	"github.com/carlosframework/platform/internal/cgroup"
	"github.com/carlosframework/platform/internal/hostbox"
	"github.com/carlosframework/platform/internal/hostclaim"
	"github.com/carlosframework/platform/internal/hostguard"
	"github.com/carlosframework/platform/internal/hostwrite"
)

func TestLaunchExecutableValidationPrecedesChild(t *testing.T) {
	ctx := t.Context()
	j, err := hostbox.OpenLaunchJournal(filepath.Join(t.TempDir(), "launch.db"))
	if err != nil {
		t.Fatal(err)
	}
	defer j.Close()
	target := hostguard.FenceTarget{Host: "app.test", Incarnation: "inc", Stamp: 1, Session: 1, Box: "box", Enrollment: "enroll", BootID: "boot", ControllerID: "ctrl"}
	if err := j.Prelaunch(ctx, hostbox.LaunchInventory{Target: target, ControllerPID: 42, ProcessStart: "start", Groups: []hostbox.LaunchGroup{{RelativePath: "parent", Device: 1, Inode: 1}}, NoState: true}); err != nil {
		t.Fatal(err)
	}
	work, _ := (hostwrite.Config{}).Select(ctx, target.Host, "spawn")
	invalid := errors.New("invalid executable")
	checked := false
	l := RoleLaunch{Parent: &cgroup.Prepared{}, ParentPath: "parent", Target: target, Work: work, Journal: j, RegisterProducer: func(context.Context, string) (RoleProducer, error) {
		t.Fatal("registered invalid executable")
		return RoleProducer{}, nil
	}, Executable: func(context.Context, *exec.Cmd) (*os.File, error) { checked = true; return nil, invalid }}
	attempt := hostclaim.WakeRetryAttempt{ID: "a", InvocationID: "inv", LaunchInputs: "inputs", Session: 1, Box: "box", Enrollment: "enroll", BootID: "boot", ControllerID: "ctrl"}
	_, child, _, err := l.prepareRoleReservation(ctx, "main", attempt, func() *exec.Cmd { return exec.Command("unused") })
	if !errors.Is(err, invalid) || !checked || child != nil {
		t.Fatalf("checked=%v child=%v err=%v", checked, child, err)
	}
	in, err := j.Read(ctx, target)
	if err != nil || len(in.Reservations) != 0 || len(in.Groups) != 1 {
		t.Fatalf("invalid executable changed journal: %+v %v", in, err)
	}
}